Latest Steelers Camp Rumblings on Harrison, Wallace, Redman, Foote & Gilbert

-- There has been a sense of uncertainty surrounding 34 year old linebacker James Harrison since camp opened up due to an on-going knee injury and that uncertainty has peaked with Harrison undergoing knee surgery Wednesday morning in what the Steelers and Harrison's camp contend was a minor procedure that normally sidelines a player for two to four weeks, but no one can put a timetable on Harrison's return right now.

The Steelers hope has been that they can get at least one more dominant season out of Harrison who is signed through 2014, but few outside linebackers at Harrison's age, 34, can sustain a pro bowl level of play because their body begins to break down sometimes by their early 30's and almost always for outside linebackers in their mid-30's.

While not in a Steelers uniform, Joey Porter for example went from 17.5 sacks at age 31 in 2008 to 9 sacks in 2009, 5 sacks in 2010 and 1 sack in 2011 at age 34 last season for Arizona, retiring this summer.

If there's one guy who could be dominant in his mid-30's, Harrison is the guy, but his body is not holding up.

-- Even with possibility of Jason Worilds starting the regular season on the PUP list, the Steelers have absolutely no plans to move Lawrence Timmons to right outside linebacker if Harrison were to miss time during the regular season. As good as Chris Carter has looked in camp, it's up in the air whether he's ready for a starters role.